Question: What is the vapor pressure of butane when its temperature is at 68.0?
Paraphrase: At a temperature f 68.0, what is the vapor pressure of butane?
SPARQL (Wikidata): SELECT ?obj WHERE { wd:Q134192 p:P2119 ?s . ?s ps:P2119 ?obj . ?s pq:P2076 ?x filter(contains(?x , '68.0')) }